Improvement in pumps



N- PETERS Fmmmnocmmu, WASHINGTON, n4 c.

N.FETERS. PMOTKLUTHOGRAPMER. WASHINGTON. D. CV I cart (effin,

NATHANIL P. SHELDON: OF-SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 110,297, dated December 20, 1870 antedated December16, 1870.'

IMPROVEMENT IN PUMPS.

The Schedule :exerted to in these Letters Patent and making-part of thesame.

I, NATHANIEL P. SHELDON, of the city and county of San Francisco, in theState of California, have invented certain Improvementsiu Pumps,applicable also to Hydraulic and Steam-Engines, of which improvementsthe 'followihg is a specification.

The nature of my invention relates to an engine or pump in which thecylinder or barrel is so shaped or cast as to form the segmentof acircle, and provided about midway between its ends with apertures oropenings, capable of being opened or closed for the admission of steamor water.

The piston or plunger of said engine or pump consists of a tube bent inthe shape of an arc of a circle, having a common center' with the centerofthe circle of which the cylinder or barrel forms a segment.

` The ends of said plunger or piston are packed and fitted -into theopen ends of said cylinder or barrel, and about midway between said endsis attached to one end of an oscillating beam, which has a journal atits other end, having-a bearing at the center of the circle of which theplunger or piston forms van arc.

At the ends, or any other convenient part of said plunger or piston,suitable valves are arranged to be opened or closed, as thecase'requires, as each side of the cylinder or barrel is to be emptiedAor filled with steam` or water.

The piston or plunger is inclosed, and moves in a semi-cylindricalcasing attached to the segment form-- ing the cylinder or barrel, andthe'water or exhaust steam is discharged through said plunger into saidcasing previous to its discharge from the apparatus.

The casing thus forms an air-chamberor condensing-chamber, as theapparatus may be used 'for a pump or steam-engine. A

Description of theAccompang/ng Drawings. Figure 1, sheet 1, is asectional view of a pump. Figure 2, sheet 1,'is an end view of a pump.Figure 3, sheet 1, vis a side View of a pump.` Figure 1, sheet 2, is asectional view of a hydraulic engine.

Figure 2, sheet 2, an end view of a hydraulic engine.

Figure 3, sheet 2, a side view of a hydraulic engine.

gine.

Figure 2, sheet 3, an end view of a steam-engine. Figure 3, sheet 3, aside view of a steam-engine.

Gen-eral Description.

Figure 1, sheet 3, a sectional view of asteam-en circular form, andsmoothly` turned to avoid friction. The remaining portion thereof may beof any desired form forarranging the valves.

A single valve ymay be used, as shown in th`e drawing ofthe pump, or apartition may be placed in the center of the plunger, audvalves placedupon either side thereof'.

B B are the receiving-chambers, andl are made of one casting, separatedby aA partition in the center. The upper ends of these chambersterminate in stuifing-boxes, through which the respect-ive ends ot' theplunger play.

Surrounding these stuug-boxes is a disk, covering thereceiving-chambers, andd forming a base for'the air-chamber. In thelower portion of each receivingchamber is an open port, for receivingwater from the suction-ports.

C is the air-chamber, and is made of au oval form, corresponding to theform of the disk upon the receiving-chamber, which forms its base. Adischarge-pipe is cast around the air-chamber, with openings into thecavity of the air-chamber at the bottom, for reeeiring therefrom, andwith an outward opening on top, for discharging into'tlieconducting-pipe.

D is the division or partition-between the receivingchambers and theports therein,

E E are the stufiing-boxes upon the receiving-chamber, through which theplunger plays. v

E is a stuffing-box, oneof which is formed in vthe air andreceiving-chambers (one-half in each) upon either side, forthe purpose"of packing around the shaft. v F, is the disk, covering thetop of thereceivingchambers outside of the stuiug-boxes, the outer edge serving asaange for attaching it to the flange of the air-chamber.

G G are glands, for pressing the packing into the stuling-bxes. l

HV is a device for forming a double valve-seat, whose ports open intothe open ports ofthe receiving-chambers. I is a valve in the plunger.

1 l are valves upon the suction-ports.

K is a shaft, to which the plunger is attached, and byY which it is-woi-ked. y I

L' is a flange for attaching the plunger to the shaft. M is a flangearound the air-chamber.

N is the discharge-pipe therefrom.

. N1 is the discharge-pipe from the hydraulic-engine.v

Nz is the discharge-pipe from the steam-engine. 0 is auoscillating-valve in the hydraulic and steamengine, to be opened andclosed by mechanical action.

O is a discharge-valve in the hydraulic-engine. P is a lever, attached.to au eccentric, for working the oscillating valves.

piston into ythe condensing-chamber.

W W are ports for admitting cold water into the condensingfchamhers.

Forincreasing the capacity of the plunger, it may be made of an oval Aorparallelogram form, t-hereby increasing its size in alateral directiononly, adapting the form of the chambers to correspond.

If needed for supplying the air-chamber with air when working under aheavy pressure, an air-cock may be placed in one of thereceiving-chambers, and

by opening it upon the receiving-stroke, and closing it upon thedischarging-stroke, supply the airfchamber of a pump with the requiredamount, or, if rcquired for au air-pump, a vvalve opening by pressurefrom without, and closed by pressure from within, may be placed in thereceiving-chambers and air pumped through water.

In the operation of my'nvention as a pump, the receiving-chambers arealternately' filled and discharged by the upward 'and downward motion ofthe respective ends of the plunger working therein, thus keeping up aconstant flow intov the air-chamber, from whence it' is discharged bythe elastic property of the air.

. A rapid motion may be given to the plunger, the elastic property ofthe air 'in which the valves play, together with the form of theplunger, preventing the jar or concussion caused by direct contact withwater under a heavy pressure.

In the operation of my invention as' a hydraulic or Y steam-en gine, thewater or steam is forced by pressure into the receiving-chambers as theports are opened and closed by the action of the oscillating valves, andin like manner. discharged through the valves upon theirrespective.pistons.

I claim as my invention- 1. 'lhe segmental cylinder or barrel, incombination with the oscillating plunger or piston, substantially asvherein descrihed.-

2, In combination with the .segmental cylinder, the air-chamber orcondensing-chamber inclosing the plunger or piston, substantially asherein described.

NATHANIEL P. SHELDON.

Witnesses:

DAVID L. SMITH, HORACEA W. SMITH.

